Lovable security checklist: The complete pre-deployment guide to protecting your Lovable.dev app.

A researcher found a Lovable app with about 18,000 users leaking names, emails, debt amounts, and home addresses.

The root cause was simple: public client access plus weak policy enforcement.

Lovable apps move quickly with Supabase, but speed can hide dangerous defaults when RLS checks are not treated as release blockers.

This lovable pre-deploy checklist helps you catch that exact class of leak before production. If you also use v0 by Vercel or Bolt.new, use the same security gate.

If you need how to secure a lovable app, focus on database policy truth, not UI assumptions. That is where lovable security vulnerabilities usually live in vibe coded app security workflows.

Secrets & Environment Variables

• Keep SUPABASE_SERVICE_ROLE_KEY server-only and never import it into client code.
• Store third-party API keys in server environment variables only.
• Scan built assets to confirm no privileged keys are present in JS bundles.
• Rotate keys immediately if any secret was committed or exposed in preview deployments.

Authentication & Route Protection

• Require auth checks on every write path, not only page-level guards.
• Validate user-to-resource ownership in server actions and route handlers.
• Reject client-provided role flags and derive authorization from trusted server context.
• Test cross-tenant access using modified IDs and stale tokens.

Database & Storage Security

• Enable RLS on every Supabase table that stores user or business data.
• Verify policies block unauthorized reads and writes with real negative tests.
• Confirm PostgREST cannot perform unauthenticated writes on sensitive tables.
• Lock storage buckets to private where content is not intentionally public.

Input Validation & XSS

• Validate all form payloads before insert or update operations.
• Sanitize rich text and markdown that renders in React components.
• Deny unknown fields so injected attributes cannot bypass business rules.
• Test stored XSS in notes, comments, profile fields, and uploaded metadata.

CORS & API Configuration

• Restrict allowed origins for custom API routes and edge functions.
• Disable wildcard CORS on all authenticated endpoints.
• Ensure auth cookies and tokens are scoped to expected domains only.
• Review generated REST routes so internal tables are not unintentionally reachable.

Rate Limiting

• Add request limits to login, signup, OTP, and reset endpoints.
• Throttle write-heavy routes to prevent scripted abuse.
• Protect public-facing query routes from scraping by IP and token.
• Monitor spikes in anonymous PostgREST requests as an abuse signal.

Run Your Security Audit

Want to know which Lovable-shaped vulnerabilities were quietly introduced into your app during rapid AI shipping?

Run the full Ubserve audit. It maps the exact issues from this checklist to your real codebase, shows where each one was found, and explains why it is exploitable in your current flow.

Then you get a fix-ready prompt for each finding that you can paste directly into Lovable to patch the vulnerability immediately and re-verify before release.

Audit my app for these vulnerabilities

If you worked through this checklist carefully, you are already ahead of most teams that ship AI-built apps. Most breaches I see are not caused by one dramatic mistake. They happen because small security gaps stack up quietly and no one does a final hard check before launch.

Take a breath, run the audit, fix what it flags, and ship with confidence. That is exactly why we built Ubserve: to give fast-moving builders a real security signal before production, not after a breach.

Samuel,
Founder of Ubserve